Audio sync drifting in rendered clips

I'm using Premiere Pro CS5.5 on a PC running Windows 7, 2.80GHz Intel Core i7 CPU, 6GB RAM, 64-bit OS.
I am working on an interview I shot with 2 Canon DSLRs, a 500D and a Rebel T3i, using audio captured with an M-Audio Microtrack II. The audio was edited down in Premiere then rendered out and handed over to a third party to be cleaned up in Pro Tools. The length of the edited interview is just short of 4 minutes.
When I preview in my Premiere timeline the audio is synced but when I render out the clip the audio drifts so that it starts already out of sync by a frame or two and by the end it's clearly off by a lot. I'm not sure how to proceed since the audio looks more or less perfect in my timeline.
I'm really hoping somebody has some suggestions as this project deadline is tomorrow, I'm supposed to be just making minor fixes at this point but suddenly I'm dealing with an issue that has totally broken nearly half my video.
Thanks

I'm definitely working with a mess of a project. Frame rates is actually one of the things I'm looking into and there are a number of discrepencies in settings between, raw footage (30fps from the 500d & 29.9 from the rebel), sequence (29.9fps) and export settings (59.9fps). Unfortunately in the overall project I'm working with video from a number of sources so I'm starting with a number of different frame rates (in other sequences I have captured video game footage that is 60fps too). I'm still going to try and match them up as best I can and hope it helps. I'm just worried that the destination for these rendered clips is a pre-existing After Effects project where all the comps are 59.9fps, if I try to change those and that causes problems I could be looking at a pretty huge set back right before my deadline.
To add a little more detail, the problem seems to be getting progressively worse. In early renders there was no sign of an issue, then yesterday during a review we noticed it was slightly off so I thought i fixed it did a render last night and when I checked it this morning it was as I described in the first post. I have at least 3 or 4 early renders where the problem was either not there or so slight it's hard to notice. The really weird thing I've discovered, if I put the rendered clip back in premiere it syncs up, but if I play it in quicktime or use it in After Effects (the next step in my workflow) it doesn't. Guess that could still have to do with frame rates. We'll see.
Thanks for the tip

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Audio sync drift after "live" CD import and convert to 48/16

I shot DV footage on a PD150 cam. The band recorded a CD from sound board to replace the mic audio of the camera. I'm running Final Cut Pro 3, and I have already converted through Quicktime the CD tracks to aiff files running at 48 ( they were 44.1) and 16 bit. The DV cam Orignal audio was also recorded at 48/16. Now when I try to sync the Cd audio (48/16) to the video clips 1: the audio sync drifts off during the song, and though it started right, the whole sync is way off by end. 2: The audio file in the track bar is longer than the video clip in the track bar above. huh? Could it be data rate Audio 187kbps vs. Video 188kbps or should I try and slow/speed up the play rate of either vid or audio. Or is this an impossible meshing of media?
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As Jim says, it's a function of how this was done. Next time you will know to look for ways to avoid the issue. But all is not lost.
I'll give you the skeleton and you can figure it out.
Find exact sync points near the beginning and end of the "video audio" and the "CD audio". Use drum beats you can be sure are the same. Identify them by ear and then by their waveforms, and put clip (not timeline) markers at those points.
Sync up the ones near the beginning exactly. Now go to the other two, find out how far apart they are, and write it down. How? I haven't got all day.
Calculate the time between the 2 markers in the video clips's audio, and between the markers in the CD audio.
Translate both of those numbers into frames.
Calculate the percentage by which the audio is longer CD audio / video audio = X%.
Go into Soundtrack Pro or audio app of your choice and make a version of the CD audio that is sped up by X%.
Bring that back to FCP and replace the version on the timeline with it.
If the markers didn't survive, find the sync points in the new CD version. Line up at the beginning. If the ones near the end now match, everything is done and you can call me "Helpful" and "Solved". If not you can be angry at me or read it again.
Good luck!

Audio sync drift issues within Premiere Pro CS6, even with 48kHz project & source material?

Evening guys and Merry Christmas to those who follow the tradition. I'm currently doing a few last minute tweaks to a live dance show that I recently shot. The show featured music that was recorded in camera (via additional mic) from the speaker setup within the theatre. This was always intended as a guide track as the original music would then be synced in the edit to give a cleaner sound to the audio during the dance sequences. I have the original CD that the music was played from on the night, however when the files are imported into Premiere Pro (or even Audition), they sync for the first 10 seconds or so and then gradually drift out of sync as the track goes on.
My project is set to 48.000 audio, which was what the original footage was shot at, as well as the audio tracks being imported as 48.000 too. Now on paper there should not be any issues with this sync drift occuring right? I've even tried with 44.100 audio files and naturally they drift out of sync.
At a loss here really as I'm not sure where i'm going wrong. Can anyone shed any light on this situation please?
Thanks!

What are you editing, and does your project match your video?
Read Bill Hunt on a file type as WRAPPER http://forums.adobe.com/thread/440037
What is a CODEC... a Primer http://forums.adobe.com/thread/546811
What CODEC is INSIDE that file? http://forums.adobe.com/thread/440037
Report back with the codec details of your file, use the programs below... a screen shot works well to SHOW people what you are doing
http://forums.adobe.com/thread/592070?tstart=30
For PC http://mediainfo.sourceforge.net/en or http://www.headbands.com/gspot/
For Mac http://mediainspector.massanti.com/
Please NOTE that the PPro CS6 screen may look a bit different (I use CS5)
For CS5 and later, the easy way to insure that your video and your project match
See 2nd post for picture of NEW ITEM process http://forums.adobe.com/thread/872666
-and a FAQ on sequence setting http://forums.adobe.com/message/3804341

Multicam Audio Sync Premiere CC MXF clips fails everytime!

Hi,
Premiere CC cannot audio sync MXF clips (from two Canon XF100s). It fails everytime and just places all clips concurrently from their start. No syncing occurs.
Is this a known bug?
Michael

Hi Kevin,
Unfortunately, no audio syncing occurred with multi-cam on 2 different formats (MPG and MP4). I did find out how to view the multi-cam sequence though.... You need to have the track with the multi-cam sequence selected. If it's not selected, the preview window is blank.
But Premiere still can't sync audio with all formats I've tried.
Message was edited by: vanlazarus2013

Audio sync drift - 44.1 to 48khz

I have an audio track that was accidentally recorded at 44.1khz. I converted the audio to 48khz for import using Quicktime, but the sync drifts noticeably from the video after about 3 minutes. How do I correct this?

Make sure the sequence audio setting is 48K, not 32K.
If the audio was not recorded with video or with a TC based audio recorder, the likelyhood of drifting is quite high.
Options -
• You can cut and shift the audio in segments as the drift becomes noticeable.
• You can use STP to RETIME the segment to something that stays in sync.
I'm sure there are others ...
Good luck.
x

Bring in audio, sync it, create new clip?

We shot and recorded "dirty" audio with the camera mic, and clean audio with an external recorder. We must have done something right, because the "external" audio seems to run at the same speed as the "dirty camera" audio. Miracles will never cease.
Anyway, for each clip I want to bring in the "clean" audio, sync it with the video/"dirty" audio, drop the "dirty" audio, and save the clip with video and "clean" audio only. Or make a new clip, or whatever. So once this is done, I can start editing the project with video and "clean" audio in each clip.
Is this possible? Anybody know how?
(P.S.: shot with the Panasonic AG-HMC150, 1080 24P at the highest data rate; Log and Transfer to ProRes 422; looks amazing!)

Experience....manual reading. But I admit I don't refer to the manual until I need to do something I don't know how to do. But that is often..
Shane

Audio Sync Issues with Long Clip

I am about to start editing a multi-cam concert shot on 5 DVX100 cameras without Jam sync TC.
In the past i have had issues with sync when digitizing long clips. is this still the case with FCP? Can i safely digitize 45-60min clips?
I am using a Pro-sumer Panasonic MiniDV Deck for capture. (it is on FCP's 'suppported devices' list)
on the avid i would digitize full tapes to make the Grouping (Multi-clipping) much faster. I want to avoid capturing a bunch of small clips on FCP and then sync them individually.
any info is greatly appreciated.
best
Mustafa
Dual G4 Tower, 500g ATA internal, bunch o' Firwire 400 Drives; PowerBook Titanium 1GigProc/1GRam Mac OS X (10.4.7)
Dual G4 Tower, 500g ATA internal, bunch o' Firwire 400 Drives; PowerBook Titanium 1GigProc/1GRam Mac OS X (10.4.7)
Dual G4 Tower, 500g ATA internal, bunch o' Firwire 400 Drives; PowerBook Titanium 1GigProc/1GRam Mac OS X (10.4.7)
Dual G4 Tower, 500g ATA internal, bunch o' Firwire 400 Drives; PowerBook Titanium 1GigProc/1GRam Mac OS X (10.4.7)

DEAD ON THE MONEY. And yes, you can do it with the HVX. This is a really cool thing. There is a gotcha-- the dvx and hvx have an internal battery that allows for the retention of things like timecode when the camera is off. You gotta be sure that battery is charged. And the way you charge it is to attach the ac adaptor and plug it into the wall with the camera off for an hour or two.
Once all the cameras are running with freerun code, you can swap batteries etc and the code just keeps going.
Another thing- when you set up your camera pile, you've got to stand a couple of feet in front of the pile when you hit the remote so that the signal gets to all the cameras.

Audio sync drifting

Log and capture files start out in sync and drift out of sync over the length of the clip. Could dissimilar Sequence, capture and device control presets cause this problem?
Seq Preset is set to DV50 48 Khz which has 16 bit 48 Khz audio
Capture Preset is set to AJA LH 525i29.97 DVCPro 50
Device Preset is set to AJA Kona LH NTSC Sony VTR which has a capture off set of -2 frames and a playback off set of +1 frame.
Audio Playback is set to built in playback with 2 ch of 24 bit 44.1 Khz.
Output to tape is AJA Kona 8 ch 24 bit, 48 Khz.
These dissimilar setting make no sense to me but that is how this system was set before I came into the picture.
Any insight would be greatly appreciated!!!
Thank you in advance for your help!!!
DKG

The editor and switcher/mixer are in different rooms but I could pull the audio into the bay if I have to but I really should be able to do this via SDI embedded.
I suggested this so that we could eliminate the deck and the process of embedding as the culprit. I understand that you don't want this as a permanent solution.
If I capture the same content that drifts from a DVCpro VTR that is fed with the same embedded SDI input everything is groovy.
So, if you record the material to tape and capture everything is good?
K

Audio sync drifts w quicktime or mpeg-2 ac3 in quicktime or dvd studio pro

Sorry to post twice but question wasn't asked right so I posted again with the subject correct as I didn't know how to delete other that said audio drifted opening in compressor which isn't the case this is about audio drifting that is perfect in a final cut pro sequence, perfect when I look at a self contained quicktime made, but when I import into dvd studio pro even before making a dvd and just looking at the video and sound in tracks as assets, it's already drifting, and is still the same if I make a dvd:
This is very perplexing.
My audio is spot on for sync in final cut sequences.
When I make a quicktime self contained and open it in final cut it is also perfect.
If I open that same finished self contained file in quicktime or place it in dvdstudio pro, there's what looks like moments the picture is faster than the sound but not always....it is not a lot like maybe 5 frames or so sometimes worse at times...this project is 90 minutes...it occurs in and out throughout not just at the top or the end.
This is the same both for the quicktime self contained with its aiff files and the mpeg with ac3 files the same amount of drift I can see when dropped into dvdstudio pro in the same places it appears...I checked the source audio files and don't see a difference
sound is mostly source 16 bit, there are music parts that were originally 24 but this isn't necessarily where this drift occurs it occurs in places where it's just dialogue.
Compressor version is 3.05 final cut studio 2 with latest updates

I opened two files they do the same things when they go into studio pro
the quicktime file
fps 23.98
rate 24.55 mbits/s
size 720x480
actual the same
playing fps (available while playing)
the mpeg 2:
720x404
fps 23.98
data size 3.85
rate 6191.42kbits/s
this is just the quicktime self contained file as I said if I open it in final cut it's right in sync, in quicktime I see the same drift as when I open this in dvd studio pro the same as with the mpeg 2 file I make in compressor...
the pixel discrepancy for whatever it means this is an anamorphic rendering in the nest just so you're aware
I am in nyc

Audio Sync Issue After Rendering

I am working on a project, with most of the original clips from Quicktime files (imported from DVD using DVDxDV). Audio/Video sync is fine when working with the clips in the bin/browser/viewer before adding them to the timeline throughout the process of making subclips, etc... However when they are actually in the timeline and rendered a greater than 1 second slip between the audio and video occurs.
Suggestions?
Thank you.
Message was edited by: gratefulredhead

I should also tell you that there has been an instance when two sub-clips of the same source were rendered, that one was synced correctly and then the other was off, which is quite confusing... The slip in sync is almost 2 seconds!

Frustrating audio sync problem with MJPG clips!

I make short films from our family trips, using the jpg:s and mjpg clips made with our Canon compact digital camera. This has worked fine (since PE 2). Now I often get a frustrating audio problem on SOME of the MJPG:s, SOMETIMES.
When I play the clip in PE7, after 0.5 - 1 sec the audio jumps back to start, before it continues to the end along with the video. This makes the audio out of sync with the video (lagging 0,5 – 1 seconds).
The only way to fix this is to separate the audio track from the video, cut the start of the audio (to where it jumps back to the start) and then move the audio track to make it in sync. Besides being a tedious way to do on all clips, the audio track is not possible to extend “in the other end”, so I have to cut the video at the end as well…
However, this is not happing on all MJPG clips but only on some.
Also, the clip looks fine in other programs, e.g. wmp or windows movie maker.
I have tried other MJPG decoders but that does not make any difference (so it’s obviously no problem with the video). The audio is PCM Audio 44100Hz, 706 kb/s mono.
Now, when I tried repairing the PE7 installation, updating DirectX, removing all caches in the project directory, rebooting, it worked! The clip I was testing was in sync!
But, the next day I noticed the sync problem again on a lot of other clips… I then thought I should try to force PE to reanalyze the video again, so I remove the cache-directories (did not help) and moved the project file to another directory (this did not help, but on the other hand, I didn’t see PE7 analyzing the video again, so maybe there is a cache somewhere else??)
I noticed (looking at properties on the clip in the preview window in PE7), that the original audio is 44100Hz mono, but PE7 converts it to 48000Hz mono. Don’t know if there is some problem there, but it should not be any difference on different clips from the same source… (and the “jump back” in audio is 0,5-1 seconds regardless of clip length, and not the 9% that the difference in frequency would suggest + the audio plays in “normal speed”).
I’ve run out of ideas!!
Please, does anybody have any constructive ideas or tips on what to try? Are there more caches to clear? Are there conflicts with another program, like wmp?
(I use PE 7.0 on a 4Gb, quadcore system running Windows Vista Home Premium 64 bit.)
// G

Thanks, I suppose I can start batch-converting my mjpg movies before importing them inte PE7, if that would make this problem disappear. I'll try that (I have FormatFactory installed, but VirtualDub seems like a nice tool if that is better), although that would make the process a bit more long-winded...
Regarding GSPOT info on a file that works and one doesn't, there are typically no difference between them (except length and content, of course). In fact, as I mentioned above, the same movie did not work until I did some reinstalling, clearing caches etc. Then the same movie suddenly worked OK again.
I attach the GSPOT info on that file.
(I never had this problem on my older XP system that run PE2...).
I will try converting to see if the problem disappears.
Thanks!
// G

FCP6 - Audio Sync Issues on Existing Clips

I recently installed the FCS2 upgrade on my MacPro desktop. I opened an existing project (with mostly 24p timelines) and there are some clips where the audio/video are not in sync. When I play the clips back from the Finder in QuickTime, they play perfectly fine. When I try playing them back in FCP6, in the Viewer window or in the timeline, the audio is not in sync.
A more accurate description would be: it's actually a VIDEO sync issue. When I get to a clip in my timeline that has this problem, the audio is accurate, but the video plays back a few seconds behind. Another observation: When I play the clip in the viewer from the beginning, the audio is in sync, by the middle it's off a little, then by the end it is VERY out of sync.
My preliminary diagnosis is that FCP6 is not interpreting the 24p files correctly. I've tried disconnecting and reconnecting the media hoping it would help but it didn't.
Sorry for the long-winded explanation. Is anyone else having these issues? Any suggestions? Thanks.

Update: In FCP6 (it may have been in FCP5 but I never saw it or used it) there is an option under Tools->Analyze Movie->Clip. When I run this against a clip that works ok, everything comes back normal. When I run this against a clip that is not working properly, it says:
Filename: Netherbeast_6-15
Duration: 00:02:20:13
Average Data Rate: 2998k/sec
Audio Grouping: Multiple
Video Track 1 (386.2 MB)
Duration: 00:02:20:13
Frame Size: 720 x 480
Color Depth: 24-bit Color
Codec: DV/DVCPRO - NTSC at Most Quality
Frame Rate: 23.98 fps
Average Data Rate: 2810k/sec (117k/frame)
This track appears to have dropped frames.
This track contains:
3372 frames of a duration of 1.2500 frames
1 frame of a duration of 1.0000 frame
Audio Track 1 (Stereo, 25.8 MB)
Duration: 00:02:20:13
Average Data Rate: 188k/sec
Format: 16-bit, Stereo
Sampling Rate: 48.000 khz
Timecode Track Source TC
Timecode: 00:27:30:14
Reel: 006
Since these clips have not changed since my FS2 upgrade, then there is a difference between FCP5 and FCP6 handle these "dropped" frames. Whereas FCP5 was more forgiving and kept the audio in sync, and FCP6 does NOT.
Does anyone have ANY idea how I can get this resolved?
MacPro QuadCore 3Ghz Mac OS X (10.4.9)

Audio sync drifting when recording

Hi everyone,
Has anyone experienced something like this?
I'm recording a webcam. A Polycom CX5000. I have it set to record the encoded video and audio with a limit of 30 minutes (creates a new file). While doing the encoding, I get no notification of any dropped frames, yet when I play back the resulting .FLV file, the audio drifts out of sync in the first file after about three minutes. When the recording went over 30 minutes, FMLE started a second file and for some reason, the sync pops back on. Is there a bug in FMLE or some setting I can do to avoid this?   I'm encoding on an i7 PC so I don't think it is a hardware issue. For encoding I was using 15fps, 640x480 and audio at mp3 224.
Thank you,
Mark

Hi,
Thanks for your response.
>1. Does the sync problem aggravates over time or does it remain constant from 3rd min to 30th min?
It aggrevated over time. You can't really notice it until around 3 minutes into the video. I watched it again and it looks like it the sync fluctuates slightly. Goes out of sync, gets back in sync (or nearly) and then goes out again.   Listening on headphones I hear tiny, split second drops outs or glitches (related?).
>2. Did you observe the sync problem in the live stream also?
This time didn't even do a live stream. Had similar issue two weeks ago that was live stream and file save. Assumed the issue was due to network issues.
>3. Can you reduce the file split time to let's say 5 min and reproduce the problem again?
Will be trying this today or tomorrow.
>4. Which audio device are you using? Is the audio and video device coming from the same device?
It is from the same device (I think.) I am remotely troubleshooting for someone so I'm not 100%. It's a Polycom CX5000. The first one we have. We previously had a Microsoft Roundtable which is the same device. The device names come up differently though so that's why I'm not positive. The Video device is currently listed as Integrated Webcam (which must be correct as I'm getting the right picture). The audio though lists "Microphone Array (IDT High Def..." something..    That might be the laptop's built in microphone? If so, that might be the issue.
>5. If you have a different audio-video devices, please try with them and come back with the result.
Will let you know.
I'm hoping it is #4 as that would be an easy fix. I would find it hard to believe Adobe released a product that couldn't keep audio and video in sync, right?
Mark

IDVD 08 audio/video sync drift toward end of DVD movie - fix/workaround?

Anyone know how I can fix this issue? It's driving me crazy.
I've just spent a few evenings in iMovie 08, editing together the video of my son's birth. All looked & amazingly good in iMovie. The "Large" .m4v file output by iMovie - Shared with the Media Browser - plays perfectly in Quicktime too.
However, after adding that shared movie to iDVD 08, and burning a DVD, I noticed that the audio sync drifts toward the end of the Movie when plated back. At the start of the DVD all seems well, but by the end of the ~1hr 20 minute movie the audio is unbearably out of sync with the video. Completely unwatchable.
After a little Googling I came across some reports that iDVD might not deal well with video that's been recorded with 12-bit audio. I've confirmed that my camcorder is (was!) set to 12-bit rather than 16-bit (the default, I'm sure). So if that's the problem I'm hosed... it's not like I can get a retake on that footage
Is there a reasonable workaround for this issue? I'm obviously unable to re-take the video (or the other 10 hours of DV video tape I've yet to use in an iMovie project). Ideally I'd like Apple to release a patch for this. Shouldn't it be possible for iDVD to account for audio that was originally recorded in 12-bit... even if it's just a checkbox you have to select to tip it off?
Then again, perhaps this is totally unrelated to the 12-bit issue, and this is just a run of the mill bug?
As I said... iMovie generates a MPEG4 video file of the Movie that looks/sounds perfect, so it seems this sync issue's being created somewhere in iDVD as it's rendering the audio/video to burn to the DVD...
Thanks in advance.

I've tried most of the options I can think of, and the audio sync drift issue continues on this ~1hr 12 minute iMovie/iDVD 08 project.
A couple of promising ideas tried used QT Pro, to export the audio track from the iMovie generated MPEG-4 file - as a WAV file, resampling to 48kHz and 16-bit... then Adding this back to the video track in the MPEG-4 file (having deleted the original audio track). In another test I also tried the Add to Selection and Scale option. Oddly enough I think the Add to Selection and Scale attempt generated more sync issues than before in the final DVD movie... so I stuck with the MPEG-4 file containing the video track and the added, resampled at 48kHz & 16 bit, WAV audio track.
This was saved as a self contained Movie file, producing a QT .mov file. I moved this .mov file into the iDVD projects directory structure so that it was avalable in iDVD's Media Browser. I then reworked the iDVD project to use this QT large.mov file, instead of the original iMovie large.m4v file.
As a reminder... the original large.m4v file has the following properties:
29.97 FPS H.264 Decoder, 960 x 540, Millions
AAC, Stereo (L R), 44.100 kHz
0:01:12:07.16 duration
The resampled and saved QT MOV file has the following properties:
29.97 FPS H.264 Decoder, 960 x 540, Millions
16-bit Integer (Little Endian), Stereo, 48.000 kHz
0:01:12:07.16 duration
BOTH versions of this Movie file play flawlessly within QT Pro... there's no audio sync drift evident toward the end of the movie unless I use iDVD 08 to burn either movie file to a Physical DVD (or DVD Disk Image). In both cases the resultant DVD Movie exhibits significant audio sync drift as the ~1hr 12 minute movie progresses. The sync goes out by ~ <= 1 second based on a rough visual assessment.
I've not yet tried to burn either the original iMovie produced MPEG-4 video file or my QT Pro tweaked audio track .MOV file version to a DVD on my PC...
... But I have used an application called Burn (referenced in this earlier/archived iDVD sync drift forum post: http://discussions.apple.com/thread.jspa?threadID=1332100 by user F Shippey - http://burn-osx.sourceforge.net/) to take the QT Pro tweaked .mov file version of the original MPEG-4 file and burn it to a DVD...
Results:
The Burn app burnt DVD plays with NO audio sync issues!... Even though it was generated from the same audio tweaked (48kHz/16-bit resampled) QT Pro .mov file.
However, whenever I burn a DVD using iDVD 08 the audio sync gradually drifts. It matters not whether I use the original iMovie 08 generated MPEG-4 movie file, or the QT Pro version of that file with the resampled audio track (the same one that works fine with Burn).
It sure looks to me like iDVD has a problem... Again, refer to http://discussions.apple.com/thread.jspa?threadID=1332100 for someone else who seems to have run into similar challenges.
Am I overlooking something?
Thanks in advance.

Sync Drift on audio

I'm sure this issue has been addressed a million ways on here, but I couldn't find the right hit on a search. I'm posting this for a friend so at some point he may jump in with clarification. I have no doubt that anyone who's interested in helping will have some spec questions, but I'll start with the issue and what I know and then we'll try to fill in the gaps based on your questions.
My friend is cutting a piece that was shot on 35mm 24fps and transferred to DVCam at 29.97 with a 3:2 pulldown. Audio was recorded to DVD RAM discs at 48 KHz and brought into FCP at 48 as well. The footage was not synced during telecine. There is matching TC though.
My friend is syncing using slates and is finding that on long takes it is evident there is sync drift. I had him do a quick test of first slowing down the audio to 80% (24/30=80) and syncing that and then speeding it up to 125% (30/24=125). Neither of those fixed the issue.
I cannot confirm that everything was shot, recorded and telecined properly, but this was a very professional operation so I'd like to start with that assumption. What might be going on here?
I have no doubt I will need to provide more info, but I'm not sure what that would be. Please, help me help you help me help my friend.
Thanks,
Martin

ssake wrote:
I don't know if this will help under these circumstances, but I have found that the audio sync drift problem is solved by making the capture settings correspond to the audio specs in the source. I ran across this problem when importing analog video, which is when most people report it.
That makes no sense. Capturing analog, which is what I did, is a process which converts the analog signal to digital. Digital settings for audio have no real analog equivalent. Video does in terms of aspect ratio, etc.
In my case the captured mov is fine. I have issues when I export and import from the FCP timeline.
Thanks,
Robert A. Ober

Audio sync drifting in rendered clips

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